Research Progress on Biological Enhancement of Soils Contaminated with Polycyclic Aromatic Hydrocarbons: Focusing on Bacterial Chemotaxis Mechanism and Application

doi:10.11924/j.issn.1000-6850.casb2024-0795

Abstract

Abstract:

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants widely present in the environment. Their concentrations in soil can reach several thousand micrograms per kilogram, causing serious damage to the soil ecological environment. Traditional physical and chemical remediation methods are not only costly, but also potentially cause secondary pollution. Currently, bioremediation has been proven to be clean and sustainable and is widely used for PAHs-contaminated soil remediation. Importantly, the bacterial chemotaxis mechanism enables more PAHs-degrading bacteria to actively migrate towards the target contaminant, thereby improving the bioavailability of PAHs to microorganisms. Therefore, this article reviewed the degradation mechanism of how bacterial chemotaxis can enhance the bioavailability of PAHs and offered suggestions for future theoretical and applied research directions in microbial PAH degradation, providing a theoretical basis for further exploring the degradation mechanism of bacterial chemotaxis in PAHs.

Key words: polycyclic aromatic hydrocarbons, bio-enhancement, bacterial chemotaxis, soil environmental remediation, chemotaxis mechanism

LIU Yuantong, SHI Yueqi, AO Guoxu, WANG Zhaoxuan, SUN Shanshan. Research Progress on Biological Enhancement of Soils Contaminated with Polycyclic Aromatic Hydrocarbons: Focusing on Bacterial Chemotaxis Mechanism and Application[J]. Chinese Agricultural Science Bulletin, 2025, 41(11): 55-63.

Figures/Tables 5

References 46

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菌株	趋化物	化学式	文献
Pseudomonas putida RKJ1	萘(Naphthalene)	C₁₀H₈	[31]
Pseudomonas putida DOT-T1E	苯衍生物(Benzene derivatives)	例：C₇H₈	[32]
Pseudomonas putida PRS2000 Pseudoalcaligenes KF707	苯甲酸(Benzoate)	C₇H₆O₂	[33] [34]
	苯甲酸(Benzoate)	C₇H₆O₂
	氯代苯甲酸(Chlorobenzoate)	C₇H₅O₂Cl
Pseudomonas fluorescens KU-7	2-硝基苯甲酸(2-nitrobenzoate)	C₇H₅NO₄	[35]
Azospirillum brasilense sp. 7, CD	苯甲酸(Benzoate)	C₇H₆O₂	[36]
	儿茶酚(Catechol)	C₆H₆O₂
	原儿茶酸(Protocatechuate)	C₇H₆O₄

菌株	趋化物	化学式	文献
Pseudomonas putida RKJ1	萘(Naphthalene)	C₁₀H₈	[31]
Pseudomonas putida DOT-T1E	苯衍生物(Benzene derivatives)	例：C₇H₈	[32]
Pseudomonas putida PRS2000 Pseudoalcaligenes KF707	苯甲酸(Benzoate)	C₇H₆O₂	[33] [34]
	苯甲酸(Benzoate)	C₇H₆O₂
	氯代苯甲酸(Chlorobenzoate)	C₇H₅O₂Cl
Pseudomonas fluorescens KU-7	2-硝基苯甲酸(2-nitrobenzoate)	C₇H₅NO₄	[35]
Azospirillum brasilense sp. 7, CD	苯甲酸(Benzoate)	C₇H₆O₂	[36]
	儿茶酚(Catechol)	C₆H₆O₂
	原儿茶酸(Protocatechuate)	C₇H₆O₄